Erratic mouse behaviour after snapd install

Asus U36 laptop
Linux Mint 20 ulyana
Release 20
5.4.0-58-generic #64-Ubuntu

As soon as snapd was installed the mouse became very erratic. Touchpad unaffected. Any clues?

That doesn’t sound right, these should be two separate things. What snap(s) did you install? If you uninstall snapd, does the problem get fixed?

What version of snapd did you install ?